Packing.



W. E. SANDERS.

' PACKING.

APPLICATION FILED OUT. 25, 1910.

1,001,693. Patented Aug. 29, 1911.

WITNESSES: M Vfnlmk tions for insertion in .ated with a cushion WALTER E.--.SANDERS, 0F CLEVELAND, OHIO.

PACKING.

Specification of Letters Patent.

Patented Aug. 29, 1911.

Application filed October 25, 1910. Serial No. 589,023.

To all whom it may concern: Be it known that I, WALTER E. SANDERS, a citizen of the United States, and a resident of Cleveland,county of Ouyahoga and State of Ohio, have invented a new and useful Improvement in Packing, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I havecontemplated applying that principle, so as to distinguish it from other inventions. An approved construction of packing, widely used in the stufling boxes about steam engines and like laces, where live steam-or an equivalent 0 ture is apt to be encountered, comprises paired triangular strips of packing material such strips having their inner or inclined 'faces adjoining so that, when pressure is applied, one will slide upon the other.

Each pair of such strips is usually associstrip of substantially circular cross section, the whole structure being -inclosed in a suitable casing which retains the parts in their proper relative posithe stuflingbox.

More or less difliculty has heretofore been encountered in the construction of the wedge-shaped strips in packing of the kind just referred to, such strips being usually made of superposed parallel plies or layers of cloth, usually duck, held togetherby a rubber compound, which layers, under the influence of the reciprocating motion of the rod, and the at the high temperature referred to, are readily detached from each other, so that the whole strip rapidly disintegrates. I have heretofore proposed to improve the construction of such strips by formingthem of a sheet of fabric wrapped around itself and held together by a rubber compound, the Whole being subsequently siredwedge form; but even in this improved construction an edge of the sheet is still left free, which, subjected to the same disintegrating influences, tends to unwind and come apart, thus detaching from the tightness of the joint which it is theobject of the packing to secure and shortening materially the life of'the packing.

The present invention has as its object the complete overcoming of the difficulty just noted, incidental to which certain other features of improvement are incorporated by relatively high temperaaction of steam and hot water permanently retain molded in the desaid cushion strip may be my new construct-ion of packing. To the accomplishment of these and related ends, said invention consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawing :Figure 1 represents in perspective a broken section of my improved wedge-shaped packing strip in a preliminary stage of its 2 illustrates the same molded into wedge form; sents a portion of a packing ring formedof such strips and an improved cushion strip, the ends of such strips appearing in transverse cross-section.

In the construction of the wedge shaped strip 1, two of which are associated together in the complete packin able core 2, preferably of relatively small diameter, such core being made out of flax or like fibrous material. then braid successive sheaths, or tubular coverings 3, of suitable fibrous material, until a body is built up of proper diameter, to form, when molded, a strip of the desired size. A layer 4; of rubber or adhesive composition is placed between the successive sheaths, so that when the strip, in the form illustrated in Fig. 1, is subjected to the molding operation, it will readily assume and the wedge-shaped form thereby given-it.

In the assembled strip of packing (see Fig. 3), two such wedge shaped strips l are associated in the fashion previously described, and a third cushion strip 5 of substantially circular cross section is disposed to rest against the face ofone such wedge strip. This cushion strip will be made of asuitable core 6 of a fibrous material, upon which a strip of cloth may be rolled; or

formed of superin which the wedge shape strips are permanently formed. Whether thus rolled or formed of successive sheaths, an outer sheath 7. is Woven thereon, which I make of large mesh in order that the interstices therein may form pockets to hold lubricant.

, I start with a suit- Over this core I posedsheaths in a fashion analogous to that Y ture a continuous one.

.All three strips. are finally preceding forms of wedge-strip construction referred to above; slnce it is possible to braid the. sheaths 3,'which constitute the successive layers of the strip, in continuous lengths without interruption, whether the strip be built up of superposed layers or wound from a sheet, a definite limit is placed-upon the length of the product. Moreover, he Wedge-molding process, in the'pre'sent case, may follow immediately upon the application vof the final or outer sheath, in this-way rendering the manufac- Thus While I am enabled to obtain a superior product, this product is at the same time more easily and hence inexpensively manufactured. Furthermore, the continuous length thus obtained avoids the necessity for waste, when the'product is prepared for use by being cut up in rings, such waste being considerable, where the product comes as heretofore in relatively short lengths. It is also new, so far as I am aware to make molded, wedgeshaped packingstrips with cores of fibrous material, such as I have herein described. By the introduction of such a core,'the strip is given an increased flexibility. over the prevailing compact, solid construction of v other binder goes strip; so that, in other words, the packing .may be radius and still form a perfect circle withinterposed between said sheaths; a cush on readily bent to'a relatively short out binding or crimping. t

It will be understood, of course, that while I have heretofore referred to fibrous materials, which will usually be cotton or flax, as the material that along with the interposed rubber, adhesive composition, or to make up bothjthe wedge shape strips and the round cushion strips, any suitable material may be utilized in the construction of such strips- I should remark particularly that where very high temperatures are encountered,

, accordingly,

such as might carbonize the materials first referred to, it is usual to employ asbestos in one form or another. In the present case, in place of cotton or flax, I may utilize asbestos threads which can be made into a core or woven into a fabric or inclosing sheath just as readily as fibers of cotton or flax.

Other modesof a plying the'princip'le of my invention may e employed instead of whereas 7 mot s the one explained, change being made as regards the mechanism herein disclosed,

provided the means stated by any of the following claims or the equivalent of such stated means be employed. 7

I therefore particularly point out and distinctlyclaim as my invention i 1. In packing of the character described, a packing strip of molded wedge-shape, said, strip being formed of a central core of relatively flexible material, and successive concentric sheaths of fabric braided upon said core. r

2. In packingof the character described, a packing strip of molded wedge-shape, said strip being formed of a central core of relatively flexible material, successive con centric sheaths of fabric braided-upon said core, and layers of suitable binding material interposed betweensaid sheaths.

3. Packing comprising the combination of two molded wedge-shaped stripshaving 1 their inclined facesjin contact, each of'such strips including a central core composed of fibrous material more flexible than the body of said strip, substantially as described;

4. Packing comprising the combination of two molded wedge-shaped strips having strips belng formed of a central core of relatively flexible material, and successive concentric sheaths-of fabric braided upon said core.

- 5. Packing comprising thecombination of two molded wedge-shaped strips havin their inclined faces in contact, each of said strips bein formed of a central. core of relatively exible material, successive concentric-sheaths of fabric braided upon said core, and layers of suitable binding material strip adjoining one of said wedge-shaped strips; and a casing inclosing the whole 6. Packing comprising the combination of two molded wedge-shaped strips having their inclinedfaces'in contact, each of said strips being formed of a central core of relatively flexible material, successive concentric sheaths of fabric braided upon said core, and layers of suitable binding material interposed between said sheaths; a cushion strip adjoining one of said Wedgeshaped strips; a sheath of fabric of large 12 mesh inclosing "said cushion casing inclosing the whole.

Signed by me this 15th day of October, 1910.

strip; and a WALTER E; sANniiRs.

' Attested by- ANNA L. GILL,

JNo. F. OBERLIN.

their inclined faces in contact, each of said 

